const mongoose = require('mongoose')

//连接 MongoDB 
// mongoose.connect('mongodb://39.105.28.5:27017/realworld', {
//   useNewUrlParser: true,
//   useUnifiedToplogy: true
// })

// const Cat = mongoose.model('Cat', { name: String })

// const kitty = new Cat({ name: 'Zildjian' })
// kitty.save().then(() => console.log('meow'))



//连接 mysql

